Lake Manitoba

Manitoba, Lake A lake of southern Manitoba, Canada, west of Lake Winnipeg and south of Lake Winnipegosis. It is a remnant of the glacial age Lake Agassiz.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.